COMMUNICATIONSINTHEORETICALPHYSICSispublishedmonthlybytheChinesePhysicalSocietythroughtheInsti-tuteofTheoreticalPhysics,theChineseAcademyofSci-ences.Articlesinthisjournalareabstracted/indexedinSci-enceCitationIndex(SCI),ScienceCitationIndexExpanded(alsoknownasSciSearch),ISIAlertingServices,andCurrentContents/Physical,ChemicalandEarthSciences;ScienceAb-stracts(SA),ChemicalAbstracts(CA),MathematicalReview(MR),andP:H~,etc.Contributionsallovertheworldaremostwelcome.